Definition of troland
: a unit of intensity of light at the retina equal to the illumination received per square millimeter of a pupillary area from a surface having a brightness of one candle per square meter
Origin and Etymology of troland
after Leonard T. Troland †1932 American psychologist and physicist
First Known Use: 1944See Words from the same year
Biographical Note for troland
Leonard Thompson (1889–1932), American psychologist and physicist. Troland was a university instructor of psychology and a practical engineer. He devised most of the photographic and mechanical apparatus for color motion pictures. In 1922 he wrote a monograph summarizing the current state of visual science. In 1929 and 1930 he published a major two-volume treatise on the principles of psychophysiology.
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